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Finding the Fourth Proportional to 216,457.70, 298,518.20 and 135,892.74

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Solution

The fourth proportional to 216,457.70, 298,518.20 and 135,892.74 is: 187,410.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,457.70 : 298,518.20 = 135,892.74 : x
  2. Step 2: Convert to fraction form
    216,457.70/298,518.20 = 135,892.74/x
  3. Step 3: Cross multiply
    216,457.70x = 298,518.20 × 135,892.74
  4. Step 4: Simplify right side
    216,457.70x = 40,566,456,137.87
  5. Step 5: Solve for x
    x = 40,566,456,137.87/216,457.70
  6. Step 6: Final answer
    x = 187,410.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.